Press-button fastener



March 6, 1928. l

' E. MERZINGER PRESS BUTTON FASTENER 4Filed March 25. 1926 @m20 62660 fn l-f.

` Patented Mar. 6, 1928.

UNITED STATES PATENT oFFlcE.

EDUARD MERZINGER, 0F DRESDEN, GRMANY.

.. PRESS-BUTTON FASTENER.

Application led March 25,1926,v Serial No. 97,382, and in Czechoslovakia February 3, `1926.

` This invention is an improvement in or relating to press buttonA fasteners, thestud member of which is secured to the material or support by inserting into it the pointed end of a fastener that is passed through the said material and iscaused to curl up inside the stud. The present invention consists in providing the solid, needle-like shank of the fastener with a flattened portion of lanceolate shape near its point, which portion is bent sideways so that it Will be positively guided on being inserted into the dome of the stud instead of being rolled up therein in a haphazard manner.

A construction ofthe `fastening is illus-` trated by way of `example in the accom' panying drawing.

Figures 1 and 2 are tivo views of the needle-like shank, i

Figure 3 is a sec-tion on line :zz-m in Figure l, and i Figure 4 shows in section a press button secured on cloth or other material. The stud 1 of the press button is domeshaped and is fastened to the material in the known manner by rolling up in the dome, by pressure, a solid needle-likeL shank 3 introduced from the back ofthe material. The shank 3 has a head or disc 2.

According to the invention, the shank 3 is provided behind its point 4 Which isbent to the side, with a iiattened lanceolate portion 5 which, owing to its being guided immediately against the inside surface of the dome, induces the rolling-up movement of the shank.

i/Vhat I claim is zy y y In a press-button fastener, the combination of a dome-sliapedstud, anda 'fastening member for securing it to its supporting material; saidmember embodying a solid, needle-like shank adapted to be passed through the material and terminating in a transversely 'atteneck lanceoiate portion which tapers to a point at its apexand also tapers at its base yand which is' adapted to curl up in the dome when its pointed apex strikes against the curved inner surface of the-dome and to be positively guided in its curling by suoli surface, said lanceolate portion being curved laterally in the same general direction as the aforesaid dome surface so as to assist the curling action.

'In testimony whereof I affix my signa4 i ture. 

